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基于经验模式分解的太阳南北半球黑子面积的Rieger-type周期相位分析 被引量:1

Rieger-type Periodic Phase Analysis of Sunspot Areas in the Northern and Southern Hemispheres Using Empirical Mode Decomposition
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摘要 采用经验模式分解技术研究了从第12到第24太阳活动周黑子面积数据中的Rieger-type周期,以及它们在南北半球上的相位关系。研究发现:(1)Rieger-type周期尺度以及时间尺度在两个半球上是不一样的,从而导致了半球分布的不对称性;(2)平均Rieger-type周期在北半球上的周期长度略大于南半球上的;(3)占主导地位半球的Rieger-type周期的相位不一定是超前的,半球Rieger-type周期尺度相近的也并不一定是相关性强的。 Empirical mode decomposition(EMD)technique is used to study the Rieger-type cycle in the sunspot area data from the 12th to 24th solar cycles and their phase relations in the northern and southern hemispheres.It is found that:(1)the Rieger-type cycle scale and the time scale are different in the two hemispheres,which leads to the asymmetry of the hemispheric distribution;(2)the average Rieger-type cycle length in the northern hemisphere is slightly longer than that in the southern hemisphere;(3)the phase of the dominant hemisphere is not necessarily ahead of time.The hemispherical Rieger-type with similar cycle scales is not necessarily a strong correlation.
作者 刘伟行 钱雅文 邓林华 冯松 Liu Weihang;Qian Yawen;Deng Linhua;Feng Song(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,China;Key Laboratory of Solar Activity,Chinese Academy of Sciences,Beijing 100101,China;Yunnan Observatories,Chinese Academy of Sciences,Kunming 650011,China)
出处 《天文研究与技术》 CSCD 2019年第2期151-157,共7页 Astronomical Research & Technology
基金 国家自然科学基金(11463003 11873089 11763004) 云南省应用基础研究计划重点项目(2018FA035) 中国科学院太阳活动重点实验室开放课题(KLSA201715 KLSA201709)资助
关键词 太阳南北半球不对称 Rieger-type周期 相位 Asymmetrical solar hemispheres Rieger-type cycle Phase
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